Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 436 · 40 questions

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

1. 1.58 + 74 + 17 + 82 =
2. 2.74 × 8 =
3. 3.750 ÷ 50 =
4. 4.5% of 770 =
5. 5.447 − 57 =
6. 6.380 − 38 =
7. 7.15 × 5 =
8. 8.39² =
9. 9.128 − 88 =
10. 10.19 × 15 =
11. 11.1 + 5 + 8 + 1 + 5 =
12. 12.1% of 700 =
13. 13.37 + 16 + 77 + 45 =
14. 14.Check with nines: 897 + 929 = 1824. Correct or wrong? (a) wrong (b) correct
15. 15.6 + 7 + 2 + 8 =
16. 16.₹39.90 − ₹29.30 =
17. 17.Check with nines: 214 + 371 = 585. Correct or wrong? (a) correct (b) wrong
18. 18.Best estimate of 97 × 7? (a) 1400 (b) 7000 (c) 700 (d) 70
19. 19.205 − 88 =
20. 20.Best estimate of 91 × 19? (a) 18000 (b) 180 (c) 1800 (d) 3600
21. 21.16 × 8 =
22. 22.Check with nines: 431 + 619 = 1057. Correct or wrong? (a) wrong (b) correct
23. 23.522 − 48 =
24. 24.Best estimate of 81 × 69? (a) 560 (b) 11200 (c) 56000 (d) 5600
25. 25.92 × 50 =
26. 26.Best estimate of 498 × 8? (a) 4000 (b) 8000 (c) 40000 (d) 400
27. 27.44 × 5 =
28. 28.14 × 18 =
29. 29.Check with nines: 36 × 19 = 689. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 48 × 75 = 3600. Correct or wrong? (a) wrong (b) correct
31. 31.Best estimate of 18 × 49? (a) 10000 (b) 2000 (c) 100 (d) 1000
32. 32.15% of 550 =
33. 33.Check with nines: 449 + 530 = 979. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 499 + 182 = 681. Correct or wrong? (a) wrong (b) correct
35. 35.13 + 39 + 70 + 87 =
36. 36.426 − 87 =
37. 37.Best estimate of 52 × 69? (a) 35000 (b) 7000 (c) 3500 (d) 350
38. 38.13 × 15 =
39. 39.17 × 15 =
40. 40.14 × 50 =

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